Web Page closes

[pennydog]

I need some help please. The past few days when we have been on various web pages, the page will close and take us back to the desktop. It is almost like we have clicked the X to close out of the page. Our mouse is really jerky and the cursor goes wild at times. We also get a lot of "program not responding" error messages. The program is running extremely slow.

I have scanned with our Antivir, scanned with the malware program and it shows nothing. Adaware found 4 data miners/tracking, but I deleted those. We have tried system restore to an earlier point, but it still does it. Also, we have disabled a lot of the programs that run in the background at startup.

Any ideas? Thanks.

We run Win XP Pro, DSL, IE-7, have an AV and the firewall activated.